My check box now has "checked" state as default , but now I can't toggle my check box off and on anymore (it stays "checked" all the time no matter what I do), if I comment out my add_option() obliviously my default "checked" state will not be set but I will be able to toggle and save my check box states again.

How can I add "checked" state by default and still be able to toggle and save options for my check box?
I will be more than happy to add 50 bounty for solving this. THX!